build(deps): bump mistune from 3.1.4 to 3.2.1

Bumps [mistune](https://github.com/lepture/mistune) from 3.1.4 to 3.2.1.
- [Release notes](https://github.com/lepture/mistune/releases)
- [Changelog](https://github.com/lepture/mistune/blob/main/docs/changes.rst)
- [Commits](https://github.com/lepture/mistune/compare/v3.1.4...v3.2.1)

---
updated-dependencies:
- dependency-name: mistune
  dependency-version: 3.2.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
     "djangorestframework~=3.16.0",
     "drf-spectacular~=0.29.0",
     "gunicorn==23.0.0",
-    "mistune~=3.1.3",
+    "mistune~=3.2.1",
     "openpyxl~=3.1.5",
     "procrastinate[django]~=3.5.3",
     "psycopg[binary,pool]==3.3.3",